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A mathematical model of some viral-induced autoimmune diseases.

Kolev M., Nikolova I.

Mathematica Applicanda

2018

Vol. 46, no. 1

97--108

We propose a new mathematical model of viral-induced autoimmune diseases. The model is described by a bilinear system of four integro-differential equations of Boltzmann type. We present numerical results illustrating several typical outcomes of autoimmune diseases. In particular, special attention is devoted to the role of the ability of effector immune cells to destroy target cells for the development of autoimmune diseases.

W pracy został zaproponowany nowy matematyczny model chorób autoimmunologicznych wywołanych przez wirusy. Model opisany jest dwuliniowym układem czterech równań całkowo-różniczkowych typu Boltzmanna. Zaprezentowane są wyniki obliczeń numerycznych ilustrujące kilka typowych przebiegów takich chorób. Szczególną uwagę poświęca się roli zdolności efektorowych komórek odpornościowych do niszczenia komórek docelowych w rozwoju chorób autoimmunologicznych.

Absence of evidence for viral infection in colony-embedded cyanobacterial isolates from the Curonian Lagoon

Sulcius S., Staniulis J., Paskauskas R., Olenina I., Salyte A., Ivanauskaite A., Griniene E.

Oceanologia

2014

No. 56 (3)

651--660

The aim of the present study was to assess the frequency of viral infections in colony-embedded cells of the cyanobacteria Aphanizomenon flos-aquae and Microcystis aeruginosa collected from the brackish Curonian Lagoon. Natural and mitomycin C-treated A. flos-aquae and M. aeruginosa samples were examined for the presence of viruses and lysis by a combination of light-, epifluorescence and transmission electron microscopy techniques. Here we report a lack of evidence for virus infection, progeny formation and cell lysis in colony-embedded cells of A. flos-aquae and M. aeruginosa. These results indicated that viruses contribute little to the mortality of these cyanobacteria when the latter occur in colonies. Consequently, the results supported the hypothesis that colony formation can, at least temporarily, provide an efficient strategy for protection against virus-induced mortality. Finally, assuming that grazing has a negligible effect on colony-embedded cells in the Curonian Lagoon, we propose that most of the cyanobacterial biomass produced is lost from the pelagic food web by sedimentation.